1 2

1. GND

3. DC

7. Reset_N

CC2511 Dongle

2.VDD

4.DD

Figure 4: Recommended debug connector layout (Top view)

Figure 4 shows the required signal for a minimum connector layout.

Figure 5: SmartRF04EB debug connector for debugging

CC2511 Dongle / other external target systems

5.1Debugging USB firmware

When writing and debugging USB firmware one should remember that when Windows (or another OS) detects a USB device it will assume that it works in accordance with the USB specification. During debugging this might not be the case. Breakpoints may stop the execution of code on the CC2511 Dongle and firmware under development may not be completed or error free. This may lead to the PC disconnecting the CC2511 Dongle and turning off or toggling its power supply. In some cases Windows (or the OS in use) may crash or misbehave. Hence breakpoints should be used with caution.

Obviously inserting and using breakpoints in the firmware during debugging will be extremely useful to pinpoint bugs and follow code execution. And they can and should be used. But they will also stop the code execution on the CC2511 and may cause the device to act in conflict with the USB specification. This can lead to the PC disconnecting the CC2511 Dongle, sending a USB reset or worst case the operating system may crash.

If the firmware contain bugs that make the PC disconnect the CC2511 Dongle it may be necessary to disconnect the USB cable, and power the CC2511 Dongle from the SmartRF04EB in order to reprogram it.

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Texas Instruments CC2511 user manual Recommended debug connector layout Top view

CC2511 specifications

Texas Instruments CC2511 is a highly versatile and efficient System-on-Chip (SoC) designed for wireless communication applications in the 2.4 GHz ISM band. This device is particularly suitable for low-power, low-rate wireless connections, making it ideal for applications such as home automation, industrial control, and medical device communications.

One of the key features of the CC2511 is its integrated low-power, high-performance radio transceiver, which enables robust wireless communication. The device supports a wide range of modulation schemes, including 2-FSK and GFSK, allowing for flexible communication options tailored to specific application requirements. With a maximum output power of +5 dBm, the CC2511 ensures reliable transmission over significant distances while maintaining energy efficiency.

The CC2511 also incorporates a powerful 8051 microcontroller. This 8-bit microcontroller operates at speeds up to 24 MHz and is equipped with 128 bytes of RAM and 4 KB of Flash memory. The integration of the microcontroller allows developers to run application code directly on the chip, simplifying the design and reducing the need for additional components.

Additionally, the CC2511 features multiple connectivity options, including a hardware accelerator for AES-128 encryption. This ensures secure data transmission, which is crucial for applications that require privacy and protection against unauthorized access. The built-in power management features allow for energy-efficient operation, with various sleep modes that help extend battery life for portable devices.

Moreover, the CC2511 supports the SimpleLink technology from Texas Instruments, which offers a seamless development environment and user-friendly tools. Developers can take advantage of software development kits (SDKs), sample applications, and extensive documentation to streamline the development process.

In terms of characteristics, the CC2511 operates across a wide range of temperatures, making it suitable for various environmental conditions. Its compact size and low power consumption make it an excellent choice for battery-operated devices.

In conclusion, Texas Instruments CC2511 stands out as a leading solution for low-power wireless applications with its integrated transceiver, microcontroller, and advanced features. This SoC empowers developers to create innovative and efficient communication solutions across various industries.